EP0136664B1 - Dispositif de mise en contact pour analyseur de gaz - Google Patents

Dispositif de mise en contact pour analyseur de gaz Download PDF

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Publication number
EP0136664B1
EP0136664B1 EP84111569A EP84111569A EP0136664B1 EP 0136664 B1 EP0136664 B1 EP 0136664B1 EP 84111569 A EP84111569 A EP 84111569A EP 84111569 A EP84111569 A EP 84111569A EP 0136664 B1 EP0136664 B1 EP 0136664B1
Authority
EP
European Patent Office
Prior art keywords
contact tube
tube
carrier gas
bore
test water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP84111569A
Other languages
German (de)
English (en)
Other versions
EP0136664A3 (en
EP0136664A2 (fr
Inventor
Gottfried Ebbers
Jürgen Zschetke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Interatom Internationale Atomreaktorbau GmbH
Original Assignee
Interatom Internationale Atomreaktorbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Interatom Internationale Atomreaktorbau GmbH filed Critical Interatom Internationale Atomreaktorbau GmbH
Priority to AT84111569T priority Critical patent/ATE49299T1/de
Publication of EP0136664A2 publication Critical patent/EP0136664A2/fr
Publication of EP0136664A3 publication Critical patent/EP0136664A3/de
Application granted granted Critical
Publication of EP0136664B1 publication Critical patent/EP0136664B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state

Definitions

  • the present invention relates to a contact apparatus for a gas analyzer for the quasi-continuous measurement of small gas fractions in a continuous water flow.
  • a thermal conductivity detector and argon as the carrier gas, there is a detection limit of 0.01 ppb for hydrogen, 0.5 ppb for oxygen and 1 ppb for nitrogen.
  • Typical measured values at power plants are between 1 and a few 100 ppb, while monitoring a process for catalytic oxygen removal also results in percentages.
  • the continuously flowing sample water is brought into contact with a carrier gas under precisely defined conditions, the carrier gas, e.g. B. high-purity argon, which entrains the gases present in the sample water.
  • the carrier gas e.g. B. high-purity argon
  • the enriched gas mixture is chromatographically separated with a separating column filled with a molecular sieve and then detected quantitatively by means of thermal conductivity detection.
  • the present invention relates to the contact apparatus in which the carrier gas is brought into contact with the sample water.
  • a device of this type has already been described in German Offenlegungsschrift 2363370.7.
  • the object of the present invention is to increase the sensitivity and the measuring accuracy of the known device.
  • a largely constant temperature of sample water and carrier gas is important for the devices of this type, and the combination and separation of sample water and carrier gas must be carried out very carefully and under constant conditions. With inflow and outflow of sample water and carrier gas, as well as in the actual contact tube, gas bubbles should be avoided. Pressure fluctuations and thus also lead to changes in flow and could transport the moisture into the subsequent separation column.
  • a contact apparatus according to the first claim is first proposed.
  • the cylinder arranged within the two coils with its openings at the upper and lower end and with the heating element contained therein results in a constant circulation of the water in the container due to convection, which is heated within the cylinder and rises accordingly and flows downwards outside the cylinder.
  • the proposed arrangement of the heating element within the cylinder prevents individual hot strands from directly contacting the contact tube and causing different temperatures there and in time and place.
  • the container 1 consisting of a cylindrical part 2, a lid 3 and a bottom 4, contains two helically arranged tubes, namely the contact tube 5 and of substantially smaller diameter, the water supply tube 6, both of which are spaced around an inner one Cylinder 7 are wound, which rests on the bottom 4 and cover 3 and there each have a plurality of radial openings 8 distributed uniformly over the circumference.
  • an electric heating element 9 is inserted centrally and tightly, which is regulated by a temperature measuring device 10, which is inserted tightly and centrally in the cover 3.
  • the lower end of the contact tube 5 is welded into a separator block 11, which also carries a gas supply line 12 and a water drain line 13, which ends with a U-bend.
  • the upper end of the water supply line 6, like the contact tube 5, is welded into a separating block 14 which also carries a gas discharge line 15 which leads upwards out of the container 1.
  • FIG. 2 shows the lower separating block 11 from FIG. 1, with which the sample water emerging from the contact tube 5 is conducted to a drain and with which the carrier gas is introduced into the contact tube through bore (18). It is important at this separation block that the carrier gas enters above the sample water, so that no gas bubbles can arise in the water flow. Furthermore, the transition between the bore 16 and the bore 17 should be rounded so that the sample water can flow there in a laminar manner and without the formation of drops. So that this rounding can be machined and checked, the separating block 11 is expediently separated into two parts before machining in accordance with the black line in bore 17 and only after the machining.
  • Fig. 3 shows the separation block 14 in longitudinal section.
  • the bores described in claim 4 are first made and then, as shown in FIG. 3, closed by welding or soldering a plate 24.
  • the incoming sample water without carrier gas is passed through the bores 23 and 22 to the bore 19, which allows it to open into the contact tube 5 connected to the bore 20 at the lower end.
  • This arrangement prevents 14 gas bubbles from forming within the separating block, which could lead to small pressure fluctuations or to a transport of moisture into the subsequent separating column.
  • a gas collecting space 21 is arranged above the bores 19 and 20 and is also intended to prevent the transport of moisture with the carrier gas stream.
  • a reducer 25 for the connection of the gas discharge line 15 is arranged.
  • the bore 22 in the separating block 14 is closed by a plug 26.
  • FIG. 4 shows, as an alternative to the U-bend of the water drain line 13 shown in FIG. 1, also a gas-tight water drain 27, which can also be connected to the lower end of a separating block 11 according to FIG. 2.
  • Both the U-bend and the water drain 27 should end in a space of atmospheric pressure so that the pressure in the contact tube 5 remains constant, and should also protect the contact tube against the entry of undesirable amounts of gas.
  • the drain 27 consists of several welded pipe sockets and turned parts, the design of which can be seen in FIG. 4.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Claims (6)

1. Appareil de mise en contact, pour un analyseur de gaz, en vue de mesurer en continue de faibles proportions de gaz dans de l'eau, constitué d'une cuve thermostatisée, ayant un tube de mise en contact qui est enroulé en hélice et dans lequel peuvent s'écouler vers le bas l'eau à analyser, et vers le haut et à contre-courant un gaz porteur, caractérisé en ce que, le tuyau (6), qui pénètre dans la cuve (1) et qui est destiné à l'eau à analyser, est guidé également hélicoïdale- ment et à distance du tuyau de mise en contact (5) et en ce que, à l'intérieur des deux tuyaux est disposé un cylindre (7) ayant plusieurs orifices radiaux (8) à son extrémité supérieure et à son extrémité inférieure et en ce que ce cylindre comporte à son extrémité inférieure un élément de chauffage (9).
2. Appareil de mise en contact suivant la revendication 1, caractérisé en ce que, à l'intérieur de la cuve (1), est monté, à l'extrémité supérieure du tuyau de mise en contact (5), un bloc inférieur de séparation (11) et, à l'extrémité supérieure du tuyau de mise en contact (5), un bloc supérieur de séparation (14), pour l'eau à analyser et pour le gaz porteur.
3. Appareil de mise en contact suivant la revendication 2, caractérisé en ce que, le bloc inférieur de séparation (11) porte un perçage latéral (16) pour le raccordement de l'extrémité inférieure du tuyau de mise en contact (5) et un perçage (17) dirigé vers le bas pour l'évacuation de l'eau à analyser et, à l'extrémité supérieure du bloc de séparation, un perçage (18) qui est dirigé vers le bas et qui est destiné au conduit d'alimentation (12) en gaz porteur.
4. Appareil de mise en contact suivant la revendication 2, caractérisé en ce que, à l'intérieur du bloc supérieur de séparation (14) est prévu un perçage (19) sensiblement horizontal et destiné à l'eau à analyser, sans gaz porteur, dont le diamètre est sensiblement plus petit que celui du tuyau de mise en contact (5) et qui débouche au point le plus bas du perçage (20) pour le tuyau de mise en contact (5) et en ce que, au-dessus de ces deux perçages, est disposée une chambre collectrice de gaz (21), qui peut être raccordée à son extrémité supérieure au conduit (15) pour le gaz porteur qui sort.
5. Appareil de mise en contact suivant la revendication 4, caractérisé en ce que, en dessous desdits perçages (19 et 20) sont ménagés deux autres perçages (22 et 23) qui conduisent l'eau à analyser du tuyau (6) hélicoïdal au perçage débouchant dans le tuyau de mise en contact (5).
6. Appareil de mise en contact suivant la revendication 3, caractérisé en ce que, à l'extrémité inférieure du bloc de séparation (11 a) est prévue une évacuation (27) qui communique à l'extrémité inférieure avec deux tuyaux concentriques (28, 29), le tuyau extérieur (28) étant fermé vers le bas et portant à son extrémité supérieure un raccord tubulaire (30) latéral.
EP84111569A 1983-10-06 1984-09-27 Dispositif de mise en contact pour analyseur de gaz Expired - Lifetime EP0136664B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111569T ATE49299T1 (de) 1983-10-06 1984-09-27 Kontaktapparat fuer gasanalysator.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3336423 1983-10-06
DE19833336423 DE3336423A1 (de) 1983-10-06 1983-10-06 Kontaktapparat fuer gasanalysator

Publications (3)

Publication Number Publication Date
EP0136664A2 EP0136664A2 (fr) 1985-04-10
EP0136664A3 EP0136664A3 (en) 1986-12-30
EP0136664B1 true EP0136664B1 (fr) 1990-01-03

Family

ID=6211193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111569A Expired - Lifetime EP0136664B1 (fr) 1983-10-06 1984-09-27 Dispositif de mise en contact pour analyseur de gaz

Country Status (3)

Country Link
EP (1) EP0136664B1 (fr)
AT (1) ATE49299T1 (fr)
DE (2) DE3336423A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236791A1 (fr) * 1986-02-27 1987-09-16 Siemens Aktiengesellschaft Appareil pour mesurer les gaz dissous dans l'eau
CN113776724B (zh) * 2021-08-12 2024-05-14 中国船舶重工集团公司第七一九研究所 压力测量装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1126521A (fr) * 1955-05-13 1956-11-26 Saint Gobain Perfectionnement à l'extraction de gaz dissous dans des liquides
FR1457388A (fr) * 1964-09-01 1966-01-24 Ca Atomic Energy Ltd Dispositif détecteur de faibles variations de la pureté isotopique de l'eau
DE2363370A1 (de) * 1973-12-20 1975-06-26 Interatom Vorrichtung zur bestimmung des gasgehaltes von fluessigkeiten

Also Published As

Publication number Publication date
EP0136664A3 (en) 1986-12-30
ATE49299T1 (de) 1990-01-15
DE3480950D1 (de) 1990-02-08
DE3336423A1 (de) 1985-04-18
EP0136664A2 (fr) 1985-04-10

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